org.eclipse.jdt.ui/core refactoring/org/eclipse/jdt/internal/corext/refactoring/changes/UndoablePackageDeleteChange.java

/*******************************************************************************
 * Copyright (c) 2006, 2007 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/

package org.eclipse.jdt.internal.corext.refactoring.changes;

import java.util.List;

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.SubProgressMonitor;

import org.eclipse.core.resources.IResource;

import org.eclipse.ui.ide.undo.ResourceDescription;

import org.eclipse.ltk.core.refactoring.Change;

public class UndoablePackageDeleteChange extends DynamicValidationStateChange {

	private final List/*<IResource>*/ fPackageDeletes;

	public UndoablePackageDeleteChange(String name, List/*<IResource>*/ packageDeletes) {
		super(name);
		fPackageDeletes= packageDeletes;
	}
	
	public Change perform(IProgressMonitor pm) throws CoreException {
		int count= fPackageDeletes.size();
		pm.beginTask("", count * 3); //$NON-NLS-1$
		ResourceDescription[] packageDeleteDescriptions= new ResourceDescription[fPackageDeletes.size()];
		for (int i= 0; i < fPackageDeletes.size(); i++) {
			IResource resource= (IResource) fPackageDeletes.get(i);
			packageDeleteDescriptions[i]= ResourceDescription.fromResource(resource);
			pm.worked(1);
		}
		
		DynamicValidationStateChange result= (DynamicValidationStateChange) super.perform(new SubProgressMonitor(pm, count));
		
		for (int i= 0; i < fPackageDeletes.size(); i++) {
			IResource resource= (IResource) fPackageDeletes.get(i);
			ResourceDescription resourceDescription= packageDeleteDescriptions[i];
			resourceDescription.recordStateFromHistory(resource, new SubProgressMonitor(pm, 1));
			result.add(new UndoDeleteResourceChange(resourceDescription));
		}
		return result;
	}
}